对新疆低温煤焦油抽提得到的酸性组分、碱性组分、中性组分及柱分离中性组分得到的不同极性组分进行1 H NMR和13 C NMR表征,同时利用无畸变极化转移增益法对不同类型的碳进行了归属。结果表明,新疆低温煤焦油是一种结构复杂的化合物,其...对新疆低温煤焦油抽提得到的酸性组分、碱性组分、中性组分及柱分离中性组分得到的不同极性组分进行1 H NMR和13 C NMR表征,同时利用无畸变极化转移增益法对不同类型的碳进行了归属。结果表明,新疆低温煤焦油是一种结构复杂的化合物,其中含有大量的亚甲基碳、次甲基碳等油潜力碳,可加工成汽油、柴油等高附加值的燃料油;酸性组分中含有大量的酚基,可提取酚类化工原料;中性组分以多烷基芳烃化合物为主,可用于生产芳烃等有机化合物。低温煤焦油是一种有价值的化工原料,同时,高分辨NMR为低温煤焦油的结构研究提供了一种可靠的表征手段,具有一定的研究意义。展开更多
When washed pulps is milled and ground to a fine powder, the resulting material may easily be degraded by cellulolytic enzymes. The klason and UV lignin content of the solid residuals obtained in this step were 49.9 %...When washed pulps is milled and ground to a fine powder, the resulting material may easily be degraded by cellulolytic enzymes. The klason and UV lignin content of the solid residuals obtained in this step were 49.9 % lignin for spruce KP, and 21.4 % for poplar KP. The solid residuals from enzymatic treatment contained about 93.3 % and 90.7 % of the lignin originally presented in the spruce KP and poplar KP respectively. The enzymatic treated residual was then subjected to mild acidolysis, which caused the cleavage of lignin-carbohydrate linkages. The resulting Ground Enzymatic/Acidolysis Kraft Lignin (GEA-KL) is of significantly higher yield than our previous two-step (enzymatic/acidolysis) residual kraft lignin (EA-KL). The improved method offers kraft lignin preparations in higher yield and purity than any other known method with minimal work up and solvent requirements. DFRC/quantitative 31P NMR protocol and quantitative DEPT edited 13C RMR were used for characterizing of RKLs.展开更多
文摘对新疆低温煤焦油抽提得到的酸性组分、碱性组分、中性组分及柱分离中性组分得到的不同极性组分进行1 H NMR和13 C NMR表征,同时利用无畸变极化转移增益法对不同类型的碳进行了归属。结果表明,新疆低温煤焦油是一种结构复杂的化合物,其中含有大量的亚甲基碳、次甲基碳等油潜力碳,可加工成汽油、柴油等高附加值的燃料油;酸性组分中含有大量的酚基,可提取酚类化工原料;中性组分以多烷基芳烃化合物为主,可用于生产芳烃等有机化合物。低温煤焦油是一种有价值的化工原料,同时,高分辨NMR为低温煤焦油的结构研究提供了一种可靠的表征手段,具有一定的研究意义。
文摘When washed pulps is milled and ground to a fine powder, the resulting material may easily be degraded by cellulolytic enzymes. The klason and UV lignin content of the solid residuals obtained in this step were 49.9 % lignin for spruce KP, and 21.4 % for poplar KP. The solid residuals from enzymatic treatment contained about 93.3 % and 90.7 % of the lignin originally presented in the spruce KP and poplar KP respectively. The enzymatic treated residual was then subjected to mild acidolysis, which caused the cleavage of lignin-carbohydrate linkages. The resulting Ground Enzymatic/Acidolysis Kraft Lignin (GEA-KL) is of significantly higher yield than our previous two-step (enzymatic/acidolysis) residual kraft lignin (EA-KL). The improved method offers kraft lignin preparations in higher yield and purity than any other known method with minimal work up and solvent requirements. DFRC/quantitative 31P NMR protocol and quantitative DEPT edited 13C RMR were used for characterizing of RKLs.
